However, the same student writing for a general audience should cite his or her source, as this information would not be common knowledge to the average reader. The following are examples of statements that need citation: Between 1990 and 2002, the United States was the recipient of $1.27 trillion in direct foreign investment.
Vitamin C iontophoresis is very effective for removing fine wrinkles and treating post-inflammatory hyper-pigmentation and melasma. It has become one of the major methods of maintaining healthy skin.After the treatment: Patients will be able to notice a natural glow immediately after treatment.his method can be used to drive a drug that cannot normally penetrate the skin across the barrier, in this case Vitamin C. A weekly iontophoresis treatment promote formation of collagen and continuously inhibit the formation of melanin pigment.
1 Application of hydroquinone cream (1%-4%) is a popular treatment for post inflammatory hyperpigmentation. 2  Hydroquinone creams often contain such lightening ingredients as glycolic acid, tretinoin, Vitamin C or kojic acid.ome conditions can cause post inflammatory hyperpigmentation: 1  Inflammatory skin reaction, such as dermatitis, acne or psoriasis. 2  Skin infections caused by fungi, viruses, bacteria or parasites. 3  Reactions to medications, such as drug eruptions.